llvm-objdump: Dump COFF import table if -private-headers option is given.

This is a patch to add capability to llvm-objdump to dump COFF Import Table
entries, so that we can write tests for LLD checking Import Table contents.

llvm-objdump did not print anything but just file name if the format is COFF
and -private-headers option is given. This is a patch adds capability for
dumping DLL Import Table, which is specific to the COFF format.

In this patch I defined a new iterator to iterate over import table entries.
Also added a few functions to COFFObjectFile.cpp to access fields of the entry.

Differential Revision: http://llvm-reviews.chandlerc.com/D1719

llvm-svn: 191472

1 files changed, 10 insertions, 2 deletions

diff --git a/llvm/tools/llvm-objdump/llvm-objdump.cpp b/llvm/tools/llvm-objdump/llvm-objdump.cpp
index 8065787945f..9bc092e1881 100644
--- a/llvm/tools/llvm-objdump/llvm-objdump.cpp
+++ b/llvm/tools/llvm-objdump/llvm-objdump.cpp
@@ -770,6 +770,14 @@ static void PrintUnwindInfo(const ObjectFile *o) {
   }
 }
 
+static void printPrivateFileHeader(const ObjectFile *o) {
+  if (o->isELF()) {
+    printELFFileHeader(o);
+  } else if (o->isCOFF()) {
+    printCOFFFileHeader(o);
+  }
+}
+
 static void DumpObject(const ObjectFile *o) {
   outs() << '\n';
   outs() << o->getFileName()
@@ -787,8 +795,8 @@ static void DumpObject(const ObjectFile *o) {
     PrintSymbolTable(o);
   if (UnwindInfo)
     PrintUnwindInfo(o);
-  if (PrivateHeaders && o->isELF())
-    printELFFileHeader(o);
+  if (PrivateHeaders)
+    printPrivateFileHeader(o);
 }
 
 /// @brief Dump each object file in \a a;